Airworthiness Directives; Saab Model SAAB SF340A Series Airplanes

This amendment adopts a new airworthiness directive (AD), applicable to certain Saab Model SAAB SF340A series airplanes, that requires modifying the structure of the air recirculation fan support, and replacing the air recirculation fans with two upgraded air recirculation fans; or replacing the air recirculation fans with two new air recirculation fans with brushless motors. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent incidents of smoke or a burning smell in the cabin during flight, caused by incorrect brush insulation in the motors of the air recirculation fans that provide air to the flight compartment and the passenger compartment.